20750253 has 16 divisors (see below), whose sum is σ = 28686336. Its totient is φ = 13327920.

The previous prime is 20750239. The next prime is 20750263. The reversal of 20750253 is 35205702.

It is not a de Polignac number, because 20750253 - 2⁴ = 20750237 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20750203) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 31950 + ... + 32592.

It is an arithmetic number, because the mean of its divisors is an integer number (1792896).

Almost surely, 2^20750253 is an apocalyptic number.

It is an amenable number.

20750253 is a deficient number, since it is larger than the sum of its proper divisors (7936083).

20750253 is a wasteful number, since it uses less digits than its factorization.

20750253 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1024.

The product of its (nonzero) digits is 2100, while the sum is 24.

The square root of 20750253 is about 4555.2445598453. The cubic root of 20750253 is about 274.7943498305.

Adding to 20750253 its reverse (35205702), we get a palindrome (55955955).

The spelling of 20750253 in words is "twenty million, seven hundred fifty thousand, two hundred fifty-three".